Comment 50 for bug 1828107

It's looking like maybe the most relevant GNOME issue thread is : https://gitlab.gnome.org/GNOME/gvfs/-/issues/307

(Holy cow! 6 years originally posted! Yikes!)

Also, there looks to be two open MRs in #307 (linked above) which might help. One is for use of WSD (which as demonstrated isn't relevant, in my case anyways), and the other, something about SMB server cache (which I'm a touch dubious of, but I'm asking for details).

Ondrej really carrying the torch there though! :)